BS 8634:2017 pdf download – Portable roof ladders – Specification It is not applicable to: 1) aftermarket accessories which are intended to convert leaning ladders into roof ladders; 2) roof ladders for use on mono-pitch roofs, e.g. a pent roof; 3) roof ladders used with personal protection equipment intended as a means of fall arrest unless the roof ladder is part of a proprietary system designed for that purpose; or NOTE See Annex A for further information. 4) crawling boards for use on roof angles less than 25°. 2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. BS 245, Specification for mineral solvents (white spirit and related hydrocarbon solvents) for paints and other purposes BS 7371 (all parts), Coatings on metal fasteners BS EN 131-1, Ladders — Part 1: Terms, types, functional sizes BS EN 131-2:2010+A2:2017, Ladders — Part 2: Requirements, testing, marking BS EN 131-4, Ladders — Part 4: Single or multiple hinge-joint ladders BS EN 131-6, Ladders — Part 6: Telescopic ladders BS EN ISO 3834 (all parts), Quality requirements for fusion welding of metallic materials BS EN ISO 14713-1, Zinc coatings — Guidelines and recommendations for the protection against corrosion of iron and steel in structures — General principles of design and corrosion resistance BS EN ISO 14731, Welding coordination — Tasks and responsibilities 3 Terms and definitions 3.1 aftermarket accessory component not made or supplied by the original equipment manufacturer as a part of the original product but which is added to the product after it has been produced and distributed, to enable that product to serve an additional function 3.2 bearer component of a roof ladder that provides support between the roof ladder and the roof, spreads the load, provides distance from the roof to the user’s feet and hands and accommodates the form of the roof 3.3 locking device means of preventing unintentional movement relative to each other between the connecting parts or sections of extending, hinged, telescopically jointed or multi-part (sectional) roof ladders 3.4 maximum total load maximum weight that the ladder is designed to support when set up in accordance with the manufacturer’s instruction [SOURCE: BS EN 131-2:2010+A2:2017, 3.4] 3.5 ridge...
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